CVE-2026-75124

What it is

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains a pre-authentication memory corruption vulnerability in the web management interface where the _readHttpParam function copies an oversized HTTP query string without guaranteeing NUL termination, allowing parse_query_string to process attacker-controlled data into a fixed-size stack buffer. An unauthenticated remote attacker can send an oversized GET request to dispatcher.cgi to cause denial of service of the web management interface and potentially trigger memory corruption.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

0.7% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2026-08-28 20:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-08 20:20 UTC Last updatedMost recent change to the record

Details

Published

2026-08-28 20:19 UTC

Last modified

2026-09-08 20:20 UTC

Exploit probability

0.7% · EPSS, next 30 days

Weakness

CWE-120 · Classic buffer overflow

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 8.7

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High